The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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This is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft.
Unit of Measure

Key Dimensions

Cone Part Number

 N/A LM48548

Cup Part Number

 N/A LM48510

Seal Part Number

 N/A LM48500LA

Bore (d)

 N/A 1.3750 in34.925 mm

O.D. (D)

 N/A 2.5625 in65.088 mm

Width (T)

 N/A 0.71 in18.034 mm
Dynamic Radial Load Rating - 90M Revs (C90) 1 N/A 3760 lbf16700 N
Dynamic Radial Load Rating - 1M Revs (C1) 2 N/A 14500 lbf64600 N
e Factor 3 N/A 0.38
Y Factor 4 N/A 1.59
K Factor 5 N/A 1.55

Other Dimensions

Weight

 N/A 0.54 lb0.25 Kg

Inner Ring Width (B)

 N/A 0.7200 in18.288 mm

Outer Ring Width (C)

 N/A 0.5500 in13.970 mm

Total Width (T1)

 N/A 0.785 in19.94 mm
Effective Center Location6 N/A -0.15 in-3.8 mm
Max Shaft Fillet Radius7 N/A 0.14 in3.600 mm
Max Housing Fillet Radius8 N/A 0.050 in1.27 mm

Shaft Backing Shoulder Dia. - Frontface (da)

 N/A 1.63 in41.5 mm

Shaft Backing Shoulder Dia. - Backface (db)

 N/A 1.89 in48 mm

Housing Backing Shoulder Dia. - Frontface (Da)

 N/A 2.44 in61.00 mm

Housing Backing Shoulder Dia. - Backface (Db)

 N/A 2.28 in57.91 mm

Cage Location rel. to BF (Aa)

 N/A 0.08 in2 mm

Cage Location rel. to FF (Ab)

 N/A 0.01 in0.3 mm

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)9 N/A 2430 lbf10800 N

Static Radial Load Rating (C0)

 N/A 14200 lbf63100 N

Factors

Y1 Factor 10 N/A 1.79
Y2 Factor 11 N/A 2.67
Geometry Factor (Cg)12 N/A 0.0666
  • 1 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 2 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 3 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 4 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 5 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 6 Negative value indicates effective center inside cone backface.
  • 7 These maximum fillet radii will be cleared by the bearing corners.
  • 8 These maximum fillet radii will be cleared by the bearing corners.
  • 9 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values for a single-row, C90(2) is the two-row radial value.
  • 10 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 11 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 12 Geometry constant for Lubrication Life Adjustment Factor a3l.